Microtubules are hollow tubes of protein that maintain cell shape and permit movement of cell organelles.
Explanation:
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The correct option is ZYGOTE.
In humans, a zygote refers to a fertilized eukaryotic diploid cell that is produced as a result of fertilization process that occur between a male and female gametes. This cell contains all the genetic data that is required for the growth and development of a complete human being.The zygote is the first stage in the development process of a genetically unique organism that is genetically different from its parents.
Answer:
A cladogram is a diagram used to represent a hypothetical relationship between groups of animals, called a phylogeny. A cladogram is used by a scientist studying phylogenetic systematics to visualize the groups of organisms being compared, how they are related, and their most common ancestors. A cladogram can be simple, comparing only two or three groups of organisms, or it can be enormously complex and contain all the known forms of life.
Cladogram design is universal, although simple. A cladogram consists of the organisms being studied, lines, and nodes where those lines cross. The lines represent evolutionary time, or a series of organisms that lead to the population it connects to. Nodes represent common ancestors between species. At some point in the past a population of common ancestor organisms was divided, giving rise to the different organisms being studied. Some cladograms show evolutionary time through the scale of the lines, longer lines meaning more time. Some cladograms chose to show extinct species, while others omit them. Any particular cladogram is formulated specifically for the use it is needed.
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